Oho, I read about it for hours when we got these Davis Cup tickets online—took me forever, my son calls me a "slow-learner" with such things! Those electronic lines use cameras to see where the ball lands, and the margin of error is a tiny measurement, like a few millimetres, of how much the system can doubt itself. But I’ll tell you, watching the replay on screen feels less tense than my own calculations at home—measuring the "margin of error" between my mother’s medicine costs and the scooter EMI, wondering which ball will land "out" in our budget this month.
#middle-distance#5000m
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